blob: 18a04490b9a14fc201f3e43fb8e9b290b4f23ab1 [file] [log] [blame]
/*
* Copyright 2019 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkStrikeSpec_DEFINED
#define SkStrikeSpec_DEFINED
#include "include/core/SkMaskFilter.h"
#include "include/core/SkPathEffect.h"
#include "src/core/SkDescriptor.h"
#include "src/core/SkStrikeForGPU.h"
#include <tuple>
#if SK_SUPPORT_GPU
#include "src/gpu/ganesh/text/GrSDFTControl.h"
class GrStrikeCache;
class GrTextStrike;
#endif
class SkFont;
class SkPaint;
class SkStrikeCache;
class SkSurfaceProps;
class SkStrikeSpec {
public:
SkStrikeSpec(const SkDescriptor& descriptor, sk_sp<SkTypeface> typeface);
SkStrikeSpec(const SkStrikeSpec&);
SkStrikeSpec& operator=(const SkStrikeSpec&) = delete;
SkStrikeSpec(SkStrikeSpec&&);
SkStrikeSpec& operator=(SkStrikeSpec&&) = delete;
~SkStrikeSpec();
// Create a strike spec for mask style cache entries.
static SkStrikeSpec MakeMask(
const SkFont& font,
const SkPaint& paint,
const SkSurfaceProps& surfaceProps,
SkScalerContextFlags scalerContextFlags,
const SkMatrix& deviceMatrix);
// Create a strike spec for path style cache entries.
static std::tuple<SkStrikeSpec, SkScalar> MakePath(
const SkFont& font,
const SkPaint& paint,
const SkSurfaceProps& surfaceProps,
SkScalerContextFlags scalerContextFlags);
static std::tuple<SkStrikeSpec, SkScalar> MakeSourceFallback(
const SkFont& font,
const SkPaint& paint,
const SkSurfaceProps& surfaceProps,
SkScalerContextFlags scalerContextFlags,
SkScalar maxSourceGlyphDimension);
// Create a canonical strike spec for device-less measurements.
static std::tuple<SkStrikeSpec, SkScalar> MakeCanonicalized(
const SkFont& font, const SkPaint* paint = nullptr);
// Create a strike spec without a device, and does not switch over to path for large sizes.
static SkStrikeSpec MakeWithNoDevice(const SkFont& font, const SkPaint* paint = nullptr);
// Make a strike spec for PDF Vector strikes
static SkStrikeSpec MakePDFVector(const SkTypeface& typeface, int* size);
#if SK_SUPPORT_GPU
// Create a strike spec for scaled distance field text.
static std::tuple<SkStrikeSpec, SkScalar, GrSDFTMatrixRange> MakeSDFT(
const SkFont& font,
const SkPaint& paint,
const SkSurfaceProps& surfaceProps,
const SkMatrix& deviceMatrix,
const GrSDFTControl& control);
sk_sp<GrTextStrike> findOrCreateGrStrike(GrStrikeCache* cache) const;
#endif
SkScopedStrikeForGPU findOrCreateScopedStrike(SkStrikeForGPUCacheInterface* cache) const;
sk_sp<SkStrike> findOrCreateStrike() const;
sk_sp<SkStrike> findOrCreateStrike(SkStrikeCache* cache) const;
std::unique_ptr<SkScalerContext> createScalerContext() const {
SkScalerContextEffects effects{fPathEffect.get(), fMaskFilter.get()};
return fTypeface->createScalerContext(effects, fAutoDescriptor.getDesc());
}
const SkDescriptor& descriptor() const { return *fAutoDescriptor.getDesc(); }
const SkTypeface& typeface() const { return *fTypeface; }
static bool ShouldDrawAsPath(const SkPaint& paint, const SkFont& font, const SkMatrix& matrix);
SkString dump() const;
private:
SkStrikeSpec(
const SkFont& font,
const SkPaint& paint,
const SkSurfaceProps& surfaceProps,
SkScalerContextFlags scalerContextFlags,
const SkMatrix& deviceMatrix);
SkAutoDescriptor fAutoDescriptor;
sk_sp<SkMaskFilter> fMaskFilter{nullptr};
sk_sp<SkPathEffect> fPathEffect{nullptr};
sk_sp<SkTypeface> fTypeface;
};
class SkBulkGlyphMetrics {
public:
explicit SkBulkGlyphMetrics(const SkStrikeSpec& spec);
SkSpan<const SkGlyph*> glyphs(SkSpan<const SkGlyphID> glyphIDs);
const SkGlyph* glyph(SkGlyphID glyphID);
private:
inline static constexpr int kTypicalGlyphCount = 20;
SkAutoSTArray<kTypicalGlyphCount, const SkGlyph*> fGlyphs;
sk_sp<SkStrike> fStrike;
};
class SkBulkGlyphMetricsAndPaths {
public:
explicit SkBulkGlyphMetricsAndPaths(const SkStrikeSpec& spec);
explicit SkBulkGlyphMetricsAndPaths(sk_sp<SkStrike>&& strike);
~SkBulkGlyphMetricsAndPaths();
SkSpan<const SkGlyph*> glyphs(SkSpan<const SkGlyphID> glyphIDs);
const SkGlyph* glyph(SkGlyphID glyphID);
void findIntercepts(const SkScalar bounds[2], SkScalar scale, SkScalar xPos,
const SkGlyph* glyph, SkScalar* array, int* count);
private:
inline static constexpr int kTypicalGlyphCount = 20;
SkAutoSTArray<kTypicalGlyphCount, const SkGlyph*> fGlyphs;
sk_sp<SkStrike> fStrike;
};
class SkBulkGlyphMetricsAndDrawables {
public:
explicit SkBulkGlyphMetricsAndDrawables(const SkStrikeSpec& spec);
explicit SkBulkGlyphMetricsAndDrawables(sk_sp<SkStrike>&& strike);
~SkBulkGlyphMetricsAndDrawables();
SkSpan<const SkGlyph*> glyphs(SkSpan<const SkGlyphID> glyphIDs);
const SkGlyph* glyph(SkGlyphID glyphID);
private:
inline static constexpr int kTypicalGlyphCount = 20;
SkAutoSTArray<kTypicalGlyphCount, const SkGlyph*> fGlyphs;
sk_sp<SkStrike> fStrike;
};
class SkBulkGlyphMetricsAndImages {
public:
explicit SkBulkGlyphMetricsAndImages(const SkStrikeSpec& spec);
explicit SkBulkGlyphMetricsAndImages(sk_sp<SkStrike>&& strike);
~SkBulkGlyphMetricsAndImages();
SkSpan<const SkGlyph*> glyphs(SkSpan<const SkPackedGlyphID> packedIDs);
const SkGlyph* glyph(SkPackedGlyphID packedID);
const SkDescriptor& descriptor() const;
private:
inline static constexpr int kTypicalGlyphCount = 64;
SkAutoSTArray<kTypicalGlyphCount, const SkGlyph*> fGlyphs;
sk_sp<SkStrike> fStrike;
};
#endif // SkStrikeSpec_DEFINED